Elevator stop and lock



w. 'R. NIVEN.

EILEVATOR STOP AND LOCK. APPLlCATION HLED MN. 22, 1920.'

Patented Mar. 7, 1922.

UNITED STA WILLIAM NIVEN', OF BOSTON, MASSACHUSETTS.

Application .filed January 22, 1920. Serial No.

To all whom it may concern:

Be it known that LNVILLIAM R. 'NIVEN, a citizen of the United States of America, residin at Boston, in the county of Suffolk and gtate of. Massachusetts, have invented new and useful Improvements in Elevator Stops. and Locks, of which the following is a specification.

The object of the invention is to provide a simple and relatively inexpensive device 7 adapted especially for use in connection with freight elevators wherein the movement. of t e car or cage is controlled by an operating cable, and designed to serve as a-means of actuating the operating cable to stop the car or cage at a preferred floor or station, and

also adapted to serve as a means of locking the car or cage against movement in either directionfrom said fioor or station by holdmg the operating cable against movement sufficient to operate the motor clutches or switch by which t o car is actuated; and with these objects in view the invention consists in a construction and combination of parts of which a preferred embodiment is shown in the drawing, wherein:

Figure 1 is a side view of the apparatus applicable to any of the ordinary commercial forms of elevators in connection with which an operating cable is employed.

Figure 2 is a horizontal sectional view of the same on the plane indicated by the line 2-2 of Figure 1.

Figure 3 is a plan View of'the same.

Figure 4 is a detail in perspective of one member of the clutch frame.

Figure 5 is a detail view of one of the clutch jaws.

Figure 6 is a similar View lever.

Figure 7 is a detail sectional view on the plane indicated by the line 77 of Figure 1.

he device consists essentially of a frame or casing comprising the complemental side members 10 and 11 combining to form a guide sleeve 12 flared at its extremities and adapted to receive the operating cable 13 of any of the ordinary commercial forms of freight or similar elevators of this general type, said cable carrying thespaced buttons 14 and 15 of which the latter is preferably tapered at one end as shown at 16 and is terminated abruptly at the other end to form a shoulder 17.

Located in a housing 18 formed by a circumferential intermediate enlargement of of the operating Specification of Letters Patent.

the casing are jaws 19 when in their normal positions.

, position to the actuating springs ELEVATOR STOP AND Locx.

Patented Mar. 7, 1922. 353,354.

pivotally mounted in the casing on studs 20 for transverse swingingmovement toward and from each other in a common plane and yieldingly held in closed relation by springs 21 also located within the casing and serving to overlap and obstruct the tubular passage of the guide 12 7 These jaws are cut awaly at, their inner faces to form preferably e ongated seats 22 of a combined width sufficient to receive the cable 13 but insufficient to'permit of the passage of the stops or buttons 14 and 15 when the jaws are in their closed relation, although the passage through the guide is sufficient to permit of the movem nt therethrough of the buttons when the jaws are opened or displaced by the outward swinging movement thereof upon their pivots 20.

Between the; seats 22 of the jaws and the pivotal points thereof, said jaws are notched as shown at 23 to space for the reception of an operating lever 24 pivoted as indicated at 25 to one member of the casing and adapted to cooperate with beveled cam faces 26 on the jaws when moved in the direction indicated by the arrow in Figure l, to spread the jaws in op- 21 thereof, and in order that the lever may e yieldingly retained in either of its adjusted positions, that is with the jaws closed or open, a holding spring 27 is fitted in' a recess 28 surrounding the pivot bolt 25 and serving to bear frictionally against the adjacent wall of the casing member 11. The path of movement of the lever is intersected by an eye 29 formed in the casing and adapted for engagement by the hasp of a padlock 30 and when a padlock is so engaged with the eye as indicated in Figure 1, it serves to obstruct the movement of the lever so as to prevent the manipulation thereof to spread or open the jaws.

In the ordinary operation of the elevator equipped with a device embodying the invention, and which may be conveniently mounted thereon by means of a bracket 31 having a socket 32 for the reception of a spindle 33 depending from the casing as shown clearly in Figure 1, the jaws may be locked in their open position to permit of the free passage of the buttons 14: and 15 through the cable guide 12. 1V hen it is desired on the other hand to send the elevator cage from one floor to another without provide an intervening an attendant or insure the stoppage of the car at a given floor or station without manual operation of the cable, the lever 2a may be adjusted to release the jaws 19 so that 5 upon the engagement of a button with the jaws movement serving to stop the cage will be communicated to the cable and preferably this movement is effected by the tapered end of the button 15 as in checking the upward movement of the car or cage, so that after a sufficient movement has been communicated to the cable to effect the stopbutton and will embrace the cable in the space between the buttons 1% and 15, so that further movement in either direction of the car will be prevented until the cable has been released by the shifting movement of the lever 24. And if it is desired to permanently lock the car at the station or floor at which it may be located, it is only necessary to apply the padlock to the eye 29 to prevent the releasing movement of said lever.

What is claimed is:

1. An elevator stop and lock having a casing provided with a cable guide and a housing disposed in a plane intersecting the guide at an intermediate point of its length, 30 spring actuated pivotal jaws mounted in ping of the car the jaws will slip over the the housing for arrangement at their free ends in obstructing relation with the passage of said guide, said jaws being provided with registering cable receiving seats, and a pivotal lever mounted in operative relation with cam faces of said jaws for communieating opening movement thereto, to remove the same from obstructing relation with the guide, said casing being provided in intersecting relation with the path of movement of said lever with an eye adapted for engagement by a padlock hasp.

2. An elevatorstop and lock having a casing comprising complemental side members combining to form a guide sleeve flared at its extremities and adapted to receive the operating cable of an elevator, cable engaging jaws mounted for lateral swinging movement in a plane intersecting the guide at an intermediate point in its length, each jaw being mounted in one ofthe complemental members, means for actuating the jaws to withdraw them from obstructing relation with the guide, and means holding the complemental members together and the guide in surrounding relation to the operating cable.

In testimony whereof I affix my signa ture.

' WILLIAM R. NIVEN. 

